Double-enthalpy-increase double-condensation three-stage-compression refrigerating system, air conditioner and control method

Abstract

The invention provides a double-enthalpy-increase double-condensation three-stage-compression refrigerating system, an air conditioner and a control method. The refrigerating system comprises a compressor, an evaporator, a primary condenser, a secondary condenser, a first throttle device and a second throttle device. A first flash evaporator is further arranged between the first throttle device and the secondary condenser, a first liquid outlet pipeline of the first flash evaporator communicates with the secondary condenser, and a sixth throttle device is further arranged on the first liquid outlet pipeline. A second flash evaporator is further arranged between the second throttle device and the secondary condenser, a second inlet pipeline of the second flash evaporator communicates with the secondary condenser, a seventh throttle device is further arranged on the second inlet pipeline, and the air replenishing pressure of a first air replenishing opening is larger than that of a second air replenishing opening. According to the double-enthalpy-increase double-condensation three-stage-compression refrigerating system, compared with a primary throttle or secondary throttle or tertiary throttle refrigerating circulating system, the heating amount, the refrigerating amount, the heating performance parameters and the refrigerating performance parameters of the system are greatly increased.

Description

technical field [0001] The invention relates to the technical field of air conditioning, in particular to a double enthalpy increasing double condensing three-stage compression refrigeration system, an air conditioner and a control method. Background technique [0002] In the prior art, the energy consumption of air conditioners accounts for a large proportion of the total energy consumption of buildings. How to further improve the performance coefficient of air conditioners and reduce the energy consumption of air conditioners has become the trend of the air conditioner industry. The conventional throttling refrigeration cycle system has limited evaporation pressure and condensation pressure, small cooling capacity and heating capacity, but not low compression power consumption, and it is difficult to further improve the performance coefficient of the system. One-time throttling refrigeration cycle adopts one-time throttling. The throttling degree of this cycle is limited, ...

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Problems solved by technology

[0004] Therefore, the technical problem to be solved by the present invention is to overcome the defect of the air conditioner in the prior art that the heating / refrigeration coefficient of performance of the primary throttling refrigeration cycle system is low, thereby providing a double enthalpy increasing double condensing three-stage compression refrigeration system , air conditioner and control method

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